Pneumatic dispatch tube cakrier



Feb. 14, 1939. H. BuscH PNEUMATIC DISPATCH TUBE CARRIER Original Filed Dec. 28, 1934 fl/WINVENTOR.

Reissued Feb. 14, 1939 UNITED STATES PATENT OFFICE to Airmatic Systems,

Inc., New York, N. Y., a

corporation of New York Original No. 2,023,218,

dated December 3, 1935,

Serial No. 759,479, December 28, 1934. Application for reissue October 29, 1936,, Serial No.

2- Claims.

It is been found in practice, that it is fre-- quently necessary to remove the working parts of the enclosure mechanism of this type of carrier for the purpose of cleaning, adjustment, repair, or renewal.

One object of the present invention is to improve the construction -of carriers, having this type of closure, so as to make the working partsv more accessible for cleaning and repairing.

Another object is to provide a means of lubrication for the said parts which will prevent the lubricant from soiling the papers or other contents of the carrier.

Another object is to provide improved means for-holding the working parts in position and for housing the same in the carrier.

Another object is to provide an improved arrangement for taking up the shock of the working parts incidental to the use.

A further object is to provide a form of closure grid which is relatively rigid and capable of withstanding shocks by a substantially direct transmissal of the shock forces to a firm portion of the housing.

In the accompanying drawing:--

Fig. 1 is a plan view showing the carrier open for insertion or removal of contents.

Fig. 2 is a side elevation of the same.

Fig. 3 is a plan view showing the carrier closed.

Fig. i is a longitudinal sectional view taken on the line 4-4 of Fig. 3, and

Fig, 5 is an enlarged longitudinal sectional view of the closure mechanism taken on the line 55 of Fig. 4.

Referring to the parts by reference numerals, l designates a cylindrical member closed at one end by a cup shaped member 2 which is riveted or otherwise attached thereto. A cylindrical block 3, of felt or other suitable material, is secured to the cup shaped member so as to provide a buffer or piston head for the carrier and a band or collar 6 is secured around the open end of the member I to reenforce the latter at that point. The numeral 1 indicates a tubular member closed at one end by a plug 8 and provided at the other end with a removable screw-plug 9. Through this plug is slidably movable a rod it] which is provided at one end with a removable head I l and is surrounded by a compression spring I2. The head II is shown threaded onto the rod. The action of the spring against the head II is to retract the stem or rod I0 into the housing provided by the tubular member I. The inward movement is limited by the plug 8 which is preferably rigidly secured in place. In this manner the plug 8 can readily Withstand the stocks of head ii thereagainst occurring when the carrier is in use.

The upper end of the spring bears against a collar I3 which loosely encircles the rod and is cupped on one side so as to act as a stufiing box gland, the screw-plug 9 is similarly cupped and serves as the other gland so that when packing is placed between'the two parts at M the pressure of the spring urges the red It] inwardly and also, by its pressure against the collar l3, causes the packing to prevent leakage around the rod IEI. The movable parts of the closure mechanism are thus protected from dust and dampness and oil may be placed in the tubular member to keep said parts lubricated and free from rust.

The outer end of the rod I0 is shown as being coiled to form a handle 10 and a flat spiral or grid ill", adapted when in proper position, to hold papers within the carrier. The tubular member i is attached to the inside of the member preferably by rivets through the holes l5, and in such position that when the rod I0 is drawn inward by the spring the handle ID will be entirely within the open end of the carrier.

When it is desired to place papers in the carrier or to remove them therefrom, the rod I0 is pulled outwardly, against the tension of the spring l2, by means of the handle Ill and turned so that the flat grid H3 is in the position shown in Figs. 1 and 2 of the drawing thereby permitting free access to the interior of the carrier.

After the papers or other material are inserted into the carrier, they are enclosed by rotating the grid about its stem until the grid enters the open end of the carrier, whereupon the retracting spring i2 snaps the grid and stem downwardly until the head i I engages plug 8 and stops the closure grid in rest position.

I claim:

1. A pneumatic tube carrier including a cylindrical body member having a closed and an open end, a tubular member within said body memher and attached longitudinally to the inner wall thereof, said tubular member being closed at one end and having a removable plug at the other, a rod adapted to extend from said tubular member and slide through a hole in the plug, said rod being formed at the outer end so as to be capable of confining contents within the body member of the carrier and having a head at the inner end adapted to slide within the tubular member, a collar encircling the rod, a compression spring interposed between said collar and the head. on the rod and packing interposed between the collar and plug.

2. In a closure assembly for a pneumatic carrier having an open end, said assembly embodying a closure member comprising a rod having one end formed as a closure for said open end of the carrier and the other end as a stem extending inwardly longitudinally of the carrier, a

longitudinally extending housing secured to the inner wall of the carrier having an open end for receiving said stem, a retaining sleeve about the intermediate portion of said stem deachably secured to the open end of the housing, an abutment on said stem below said sleeve, retracting means disposed between the abutment and the sleeve, and a stop member independent of the sleeve incorporated in said housing against which said stem and closure are brought to rest, whereby said sleeve is relieved of any stopping function.

HERMAN BUSCH. 

